浙江莲都区公益林森林类型动态变化研究

利用莲都区2004年界定的3.5万hm2重点公益林于2001年和2011年的规划调查和监测复查数据进行对比分析,结果表明,针叶林面积以每年2.5%速度向其它森林类型转变,面积比重由77%调整到58%;单位面积蓄积量年均净增率针叶林6.1%阔叶林3.5%针阔混交林2.4%;郁闭度≥0.5的林分面积由67.3%提高到92.6%,成过熟林的面积由9.1%提高到30.9%,提高幅度针叶林针阔混交林阔叶林。基于分析出的动态变化特征,为公益林下步按森林类型分类建设与管理提供科学依据。

Study on dynamic change of Zhejing Liandu district public welfare forest types

Key public 35000 HM2 utilization in Liandu area in 2004 defined forest in 2001 and 2011 Planning Survey and monitoring and review data for comparative analysis,The results show that,the coniferous forest area change to other forest types in the rate of 2.5% per year,the proportion of area from 77% to 58%;Volume per unit area average annual net growth rate of coniferous forest,broad-leaved forest 3.5% 〉6.1%coniferous and broad-leaved mixed forest 2.4%;Canopy density≥ 0.5 of forest area increased from 67.3% to 92.6%,over mature forest area increased from 9.1% to 30.9%,the increase of coniferous forest,coniferous and broad-leaved mixed forest,broadleaf forest.Based on the analysis of the dynamic characteristics,and provide scientific basis for forest type classification and management according to the construction of public welfare forest next.